Method of detecting residual detergent and device for detecting residual detergent

ABSTRACT

It is intended to provide a method whereby residual detergent (surfactant) can be conveniently and accurately detected in the step of washing or rinsing dishes or clothes, and a test device usable in examining the rinsed conditions. Namely, a method characterized by comprising bringing a test substance with a composition (test agent) comprising an oxalic acid ester, a fluorescent substance, hydrogen peroxide and a strong acid and thus easily detecting the residual detergent sticking to the surface of the test subject from the chemiluminescence thus caused; and a test device which is most suitable for storing the test agent as described above.

TECHNICAL FIELD

The present invention relates to a method of conveniently and accuratelydetecting residual detergent (surfactant or alkaline component) anddevice for detecting residual detergent.

BACKGROUND ART

In general, suitable surfactants are used as detergents in foodprocessing plants and for washing clothes and dishes in generalhousehold. The detergent used is washed away under running water,followed by drying. However, whether the residual detergent (surfactant)exists after drying has not been checked. The impact of the residualdetergent on human body has been considered to be one of the factorsthat cause allergies. A simple method for detecting the presence of theresidual detergent has thus been desired.

Japanese Unexamined Patent Application Publication No. 8-320315describes a method of detecting a surfactant adhering on a surface of aspecimen, comprising wiping a test portion of the specimen surface witha detecting medium to transfer the test portion to the detecting medium,bringing the detecting medium into contact with a medium containing adye, and detecting the surfactant on the basis of changes in color toneof the dye caused by the presence of the surfactant. However, changes incolor are often too subtle to identify with naked eye; moreover, thesensitivity has not been satisfactory.

The inventor of the present invention has found that a chemiluminescentliquid emits intense light when brought into contact with trace amountsof residual detergent, and made the present invention on the basis ofthe further studies.

Patent Document 1: Japanese Unexamined Patent Application PublicationNo. 8-320315 DISCLOSURE OF INVENTION Problems to be Solved by theInvention

An object of the present invention is to provide a method ofconveniently and accurately detecting residual detergent (surfactant)and a device for detecting residual detergent.

Means for Solving the Problems

The object of the present invention described above can be achievedthrough the following features.

In a composition containing an oxalate, a fluorescent substance,hydrogen peroxide, and a strong acid, examples of the oxalate includebis(2,4,5-trichloro-6-carbobutoxyphenyl oxalate) andbis(2,4,5-trichloro-6-carbopentoxyphenyl oxalate).

Examples of the fluorescent substance include9,10-bis(phenylethynyl)anthracene,1-methoxy-9,10-bis(phenylethynyl)anthracene, perylene,1,5-dichloro-9,10-bis(phenylethynyl)anthracene,1,8-dichloro-9,10-bis(phenylethynyl)anthracene, rubrene, monochloro anddichloro-substituted 9,10-bis(phenylethynyl)anthracene,5,12-bis(phenylethynyl)tetracene, 9,10-diphenylanthracene,16,17-dihexyloxyviolanthrone,2-methyl-9,10-bis-(phenylethynyl)anthracene,9,10-bis-(4-methoxyphenyl)-2-chloroanthracene,9,10-bis-(4-ethoxyphenyl)-2-chloroanthracene,16,17-didecycloxyviolanthrone, LUMOGEN RED (a perylenedicarboxylmidefluorescent agent that emits red color), LUMOGEN YELLOW (aperylenedicarboxylmide fluorescent agent that emits yellow color),LUMOGEN ORANGE (a perylenedicarboxylmide fluorescent agent that emitsorange color), 5,12-bis-(phenylethynyl)naphthacene,5,6,11,12-tetraphenylnaphthacene, and mixtures of these.

In the present invention, among the fluorescent substances describedabove, those that emit blue color are effective. For example, achemiluminescent composition containing a fluorescent substance,9,10-bis-(4-ethoxyphenyl)-2-chloroanthracene (blue emission) is atransparent liquid under naked eye and that the liquid is not emittinglight can be easily recognized with naked eye. However, if otherfluorescent substances, such as those in yellow, green, and orange, areused, they develop illusion as if they emit light when observed in apoor light.

The strong acid used in the present invention may be an organic acid oran inorganic acid. The strong acid functions as a negative catalyst thatsuppresses the reaction of the oxalate with hydrogen peroxide. Theorganic strong acid is preferably an aromatic or fatty strong acidhaving a sulfonic acid group, a phosphoric acid group, or a carboxylicacid group. Examples of the aromatic sulfonic acid include benzenesulfonic acid and p-toluene sulfonic acid. Examples of the fattysulfonic acid include methanesulfonic acid, ethanesulfonic acid, andmethanedisulfonic acid. Examples of the inorganic strong acid includebromic acid, hydrochloric acid, sulfuric acid, and nitric acid. In thisinvention, for example, 0.005 to 0.05% of sulfuric acid (about 95%) maybe added to one of a composition (A) containing an oxalate, afluorescent substance, and an organic solvent and a composition (B)containing hydrogen peroxide and an organic solvent, or a total of 0.005to 0.05% of sulfuric acid may be added to both of the composition (A)and the composition (B).

In this invention, the composition (detecting agent) containing theoxalate, the fluorescent substance, hydrogen peroxide, and the strongacid is kept in non-emission state until it contacts with residualdetergent. In order to do this, the strong acid is used to suppressreaction of the oxalate with hydrogen peroxide. In this manner, sinceemission from a test portion of a test subject that has not beenemitting light at all can be identified with naked eye, emission can beeasily recognized. Although this recognition is possible in a poorlight, recognition is further facilitated in a light-shielded container.Examples of the solvent for the chemiluminescent composition of thepresent invention include acetyl tributyl citrate (ATBC), triethylcitrate, benzyl benzoate, butyl benzoate, dipropylene glycol dimethylether (DMM), and phthalates such as dimethyl phthalate and dibutylphthalate. Moreover, tert-butanol and ethyl alcohol are preferred as thealcohol.

Although the above-described mixture of the oxalate, the fluorescentsubstance composition, hydrogen peroxide, and the strong acid hasreaction suppressed, the suppression is not perfect and degradationtends to occur after four to five months. Thus, it is best to separatelystore the composition A containing the oxalate, the fluorescentsubstance, and the organic solvent and the composition B containinghydrogen peroxide and the organic solvent. The strong acid is added toone or both of the composition A and composition B.

The detection method of the present invention is effective for detectingvarious types of surfactants. Examples of the surfactants includecationic surfactants, anionic surfactants, nonionic surfactants, andamphoteric surfactants.

The composition A and the composition B are stored in separatecontainers, and immediately before testing, the composition in onecontainer is transferred to the other for mixing. A structure in whichone of the compositions is charged in a flexible container and the othercomposition is charged in a breakable ampule contained in the flexiblecontainer so that immediately before testing, the flexible container canbe bent to break the ampule inside and shaken so that the twocompositions mix with each other is optimum as a convenient device fordetecting residual detergent.

The detecting medium preferably has a shape of a cotton-tipped swab,such as a bar provided with a fibrous impregnating material 7 that doesnot cause chemiluminescent reaction with a testing agent (FIG. 6).

ADVANTAGES

According to the present invention, emission can be readily recognizedwith naked eye by directly applying or dropping the testing agent onto atest subject, and thus the presence or absence of residual detergent canbe easily and conveniently identified. If the test subject is large insize or of a nature that does not allow direct application, a detectingmedium is used for transfer and the medium is brought into contact withthe detecting agent so that the residual detergent can be identified byemission.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1A is a cross-sectional view of a hollow container 3 of a devicefor detecting residual detergent of the present invention, B is across-sectional illustration of the device for detecting the residualdetergent, and C is an illustration showing one example of a conditionof use.

FIG. 2 is a cross-sectional view showing a filter 6 inserted into thedevice for detecting residual detergent of the present invention.

FIG. 3 is an illustration showing placing one of compositions A and B ina hollow container, placing the other composition in a hollow containerhaving a cap with a nozzle, and discharging the one in the hollowcontainer into the hollow container having the cap with the nozzle so asto mix the two compositions.

FIG. 4 is an illustration showing two hollow containers, in which one ofcompositions A and B is charged and sealed in one of the hollowcontainers, the other composition is charged and sealed in the otherhollow container, and the compositions A and B are charged into anothercontainer having a cap with a nozzle from end openings of the twocontainers so as to mix the two compositions.

FIG. 5 is an illustration showing two hollow containers each having apointed portion, in which one of compositions A and B is charged andsealed in one of the hollow containers, the other composition is chargedand sealed in the other hollow container, and ends of the pointedportions of the hollow containers are opened so that the composition inone of the hollow container is charged into the other hollow containerto mix the two compositions.

FIG. 6 is an illustration of a testing medium of the present invention.

REFERENCE NUMERALS

-   1: Composition A, 2: Composition B, 3: Hollow container, 4:    Container having a cap with a nozzle, 5: Breakable ampule, 6:    Filter, 7: Fibrous impregnating material

BEST MODES FOR CARRYING OUT THE INVENTION

The present invention will now be described in further detail byexamples below.

Example 1

A solution containing 5 wt % of bis(2,4,5-trichloro-6-carbopentoxyphenyloxalate) as the oxalate, 0.1 wt % of9,10-bis-(4-ethoxyphenyl)-2-chloroanthracene as the blue fluorescentsubstance, and 94.69 wt % of ATBC as a solvent was prepared (compositionA). A solution containing 3 wt % of hydrogen peroxide, 0.01 wt % ofmethanesulfonic acid as the organic strong acid, and 82.16 wt % of TECand 14.38 wt % of ethanol as the solvent was prepared (composition B).The composition A was mixed with the composition B. The resultingsolution was transparent and no emission phenomenon was observed.

The above-described testing agent was used to test the detergentsproduced by various manufacturers. The ratio of mixing the composition Ato the composition B was 5:1.

The measurement procedure was as follows: 5 cc of the testing agent wasplaced in a test tube, and 0.6 cc of each of detergent solutionsprepared by diluting detergents to 1000 ppm, 100 ppm, 10 ppm, and 1 ppmwas added to the testing tube dropwise.

The state of emission was observed in a dark room.

Trade name (manufacturer) Type of surfactant Product classification 1.Humming (Kao Corporation) Cationic surfactant, amine salt type Fabricsoftener 2. Emal (Kao Corporation) Nonionic surfactant, ether typeLaundry detergent 3. Kitchen Kirei Kirei Jokin & Nonionic surfactant,amine alkylene Kitchen bleach Hyohaku (Lion Corporation) oxide 4. Homing(Kao Corporation) Nonionic surfactant, ether type Cleanser 5. MoreExcellent (Kao Corporation) Nonionic surfactant, alkyl glycoside Kitchendetergent 6. Kitchen Haiter (Kao Corporation) Anionic surfactant,sulfate Kitchen bleach 7. Power Plus Joy (P&G Far East, Anionicsurfactant, sulfate and other Kitchen detergent Inc.) components 8.Yashinomi Senzai (Saraya Co., Anionic surfactant sulfate and otherKitchen detergent Ltd.) components 9. Shabondama Kitchen Soap SolidAnionic surfactant, carboxylate Kitchen soap (Shabondama Soap Co.) 10.Murin Top (Lion Corporation) Anionic surfactant, sulfonate LaundrydetergentExperimental results by observation with naked eye in a dark roomA: Strong emission, B: Emission, C: Weak emission, D: Very weakemission, E: No emissionThe results rated by the standard above are shown below:

Concentration: Concentration: Concentration: Concentration: Trade name(manufacturer) 1000 ppm 100 ppm 10 ppm 1 ppm 0. No detergent E E E E 1.Humming (Kao Corporation) A B C E 2. Emal (Kao Corporation) C E E E 3.Kitchen Kirei Kirei Jokin & A B D E Hyohaku (Lion Corporation) 4. Homing(Kao Corporation) D D D E 5. More Excellent (Kao A B C E Corporation) 6.Kitchen Haiter (Kao C D D E Corporation) 7. Power Plus Joy (P&G Far C DE E East, Inc.) 8. Yashinomi Senzai (Saraya E E E E Co., Ltd.) 9.Shabondama Kitchen Soap A C E E Solid (Shabondama Soap Co.) 10. MurinTop (Lion Corporation) A C E E

In the experiment above, emission was observed in all detergent at adetergent concentration of 1000 ppm, except for Yashinomi Senzai. Veryweak emission was observed for Homing. At a concentration of 100 ppm, noemission was observed from Emal and Yashinomi Senzai.

The surfactant components and other components of the individualproducts as far as could be investigated are described below:

Trade name (manufacturer) Surfactant component Other component 1.Humming (Kao Corporation) Ester amide-type dialkyl amine salt 2. Emal(Kao Corporation) Polyoxyethylene alkyl ether Stabilizer, pH adjustor 3.Kitchen Kirei Kirei Jokin & Alkyl amine oxide Sodium hypochlorite,sodium Hyohaku (Lion Corporation) hydroxide 4. Homing (Kao Corporation)Polyoxyethylene alkyl ether Polishing agent 5. More Excellent (Kao Alkylglycoside Stabilizer Corporation) 6. Kitchen Haiter (Kao Sodium alkylether sulfate Sodium hypochlorite, sodium Corporation) hydroxide 7.Power Plus Joy (P&G Far Sodium alkyl ether sulfate, alkyl Stabilizer,viscosity adjustor, East, Inc.) amine oxide, polyoxyethylene alkylenzyme ether 8. Yashinomi Senzai (Saraya Co., Sodium alkyl ethersulfate, fatty acid Ltd.) alkanol amide 9. Shabondama Kithen Soap SolidFatty acid sodium salt (Shabondama Soap Co.) 10. Murin Top (LionCorporation) Straight-chain sodium alkyl benzene Alkaline chemical(carbonate, sulfonate, alpha sodium sulfonate silicate), water softener(alumino silicate), stabilizer (sulfate)

Example 2 Experiments of Detecting Residual Detergent

1.

To 2000 cc of water, 1.5 cc of detergent was added, and the resultingmixture was stirred.

2.

The resulting liquid was impregnated in a sponge, and an inner surfaceof a glass cup was rubbed with the sponge times.

3.

Subsequently, running water (tap water) was poured into the cup untilthe cup is overfull, and then the cup was emptied. This was accounted asfirst rinsing. Second and third rinsing was then performed in the samemanner. The cup was then placed in a drier to dry.

4.

A testing agent of Example 1 was dropped onto the inner surface of thecup.

5.

Whether emission occurred was observed in a poor light with naked eye.

6.

The results when rinsing was performed by using warm water of 50° C. arealso shown below.

First rinsing Second rinsing Third rinsing Tap water More ExcellentEmission Emission Weak emission Power Plus Joy Emission EmissionEmission Yashinomi Senzai Emission Emission Weak emission Charmy V QuickEmission Emission Weak emission Family Fresh Emission Emission Weakemission Warm water (50° C.) More Excellent Weak emission Weak emissionBelow detectable level Power Plus Joy Weak emission Weak emission Weakemission Yashinomi Senzai Weak emission Weak emission Below detectablelevel Charmy V Quick Weak emission Weak emission Below detectable levelFamily Fresh Weak emission Weak emission Below detectable level

In the examples above, the average results of testing three cups areindicated.

The results show that these commercially available detergents are noteasy to wash off with water. It is also shown that although thedetergent are more easily washed off with warm water, three times ofrinsing are required to completely wash off the detergent.

Example 3

The relationship between the amount of residual detergent and theemission luminance was studied through experiments.

To 50 μl, 25 μl, and 5 μl of detergent, More Excellent, 50 ml, 25 ml,and 5 ml of tap water were respectively added to adjust theconcentration to 1000 ppm. Each of the resulting mixture was placed in athermostatic oven at 80° C. to dry.

(Since the concentration was the same, the amount of tap water addedincreases with the amount of detergent.)

After each sample was left to stand at room temperature, 10 ml of thetesting agent of Example 1 was added, and measurement was conductedafter stirring.

The luminance meter was LS100 produced by Minolta Corporation, and theunit of measure was mcd/m² (the luminance meter and the units of measurebelow are also the same).

Measurement results Amount of detergent added Trade name 50 μl 25 μl 5μl More Excellent 323 202 134

The results show that the level of luminance increases with the amountof residual detergent and can be used as the standard for understandingthe amount of residual detergent in household and plants using the samedetergents.

In this invention, it has been confirmed that the testing agent reactswith the minor components in the tap water and thereby emits light. Ifthe level of emission caused by the minor components is high enough tobe recognizable with naked eye, the testing becomes incomplete. Thus,the reaction must be suppressed to a degree that the emission is notrecognizable. In view of the above, the optimum amount of themethanesulfonic acid was investigated.

Example 4 Reaction of Minor Component in Tap Water with Testing Agent

A testing agent was prepared by adjusting the concentration ofmethanesulfonic acid of Example 1 as below (A:B=5:1).

Into containers, 50 ml, 25 ml, and 5 ml of tap water was charged anddried at 80° C. To each dried container, 10 ml of the testing agent wasadded to measure emission.

Concentration of Amount of water methanesulfonic acid 50 ml 25 ml 5 ml0.001% 116 35 15 0.005% 17 9 9 0.01% 6 6 6 0.015% 7 5 2 0.02% 5 3 3

In the case where methanesulfonic acid was used, the concentration atwhich no emission was recognized was about 0.01%; however, theconcentration varies with the type of the organic strong acid used.Thus, the concentration is not particularly limited to this.

It should also be noted that the sensitivity of human eye to lightdiffers from person to person. It can be assumed that the luminance atwhich blue light can be recognized in a poor light is about 30 mcd/m².

The following test was conducted next.

Three types of aqueous solutions with detergent (More Excellent)concentrations of 100 ppm, 10 ppm, and 1 ppm, respectively, wereprepared with tap water. Glass cups were respectively immersed in theaqueous solutions, emptied, and dried. The testing agent of Example 1was dropped onto the dried glass cups and the glass cups were observedwith naked eye in poor light. Emission was confirmed from the 100 ppmand 10 ppm samples but emission from the 1 ppm could not be confirmedunless in a dark room.

Example 5 Measurement of Emission Luminance after Solution Containingppm of Surfactant was Dried 1. Objective

To measure the catalytic effects of anionic, cationic, nonionic, andnonionic surfactants for luminescent liquids.

2. Specimens

The surfactants produced by Dai-ichi Kogyo Seiyaku Co., Ltd., andindicated in Table 1 below were used as the surfactants.

Surfactants produced by Dai-ichi Kogyo Seiyaku Co., Ltd.

TABLE 1 Surfactant Product name type Composition Concentration 1.Monogen T-423S Anionic Triethanolamine alkyl sulfate 35% 2. Hitenol 330TAnionic Sodium polyoxyethylene tridecyl ether sulfate 35% (3E.O.) 3.Neo-Hitenol L-30 Anionic Disodium polyoxyethylene lauryl sulfosuccinate25% 4. Neocol YSK Anionic Dioctyl sodium sulfosuccinate 70% 5.Neo-Hitenol ECL-30S Anionic Sodium polyoxyethylene lauryl ether acetate27% 6. Plysurf A208B Anionic Polyoxyethylene lauryl ether phosphoricacid 99% 7. Catiogen TMP Cationic Cetyltrimethylammonium chloride 29% 8.Catiogen BC-50 Cationic Benzalkonium chloride liquid 50% 9. Amogen SAmphoteric Betaine lauryldimethylaminoacetate 32% 10. Amogen AOLAmphoteric Lauryldimethylamine oxide liquid 32% 11. Noigen CL-200Nonionic Special ether-type nonionic surfactant 100%  12. Noigen TDS-50Nonionic Polyoxyethylene tridecyl ether 100%  13. Noigen TDS-200DNonionic Polyoxyethylene tridecyl ether 100%  14. Dianol CDE NonionicCoconut oil fatty acid diethanolamide 100%  15. Sorgen TW-80V NonionicPolyoxyethylene sorbitane monooleate (20 100%  E.O.)3.

Measurement Instrument

Luminance meter: MINOLTA LS-100

4.

Experiment Procedure

(1) Each surfactant was diluted with water to a concentration of 25 wt%.(2) From the 25% surfactant solution prepared as above, 25 μl wassampled and charged in a 100 ml beaker, and 25 ml of water was added tothe beaker to adjust the concentration to ppm. The resulting mixture wasthoroughly stirred.(3) The beaker of (2) was placed in a thermostatic oven at 80° C. anddried until moisture was gone (1 day).(4) The fluorescent liquid shown in Table 2 was mixed with an oxidizingliquid at a volume ratio of 5:1. The resulting liquid (10 ml) was pouredinto the beaker dried in (3) and thoroughly stirred.(5) The emission luminance of the luminance liquid 1 minute and 10minutes after the liquid was poured into the beaker was measured.(6) Samples with weak emission were readjusted so that the concentrationin (2) was increased to 5000 ppm and 10000 ppm and were subjected to theoperations of (3) and onward to measure the emission luminance.

TABLE 2 Luminescence liquid composition Chemical name Conc. FluorescentOxalic acid ester Bis[3,4,6-trichloro-2-(3- 0.123 mol/L liquid, oxalateCPPO methylbutyloxycarbonyl)phenyl]oxalate Fluorescent substance2-Chloro 9,10-Bis(4-ethoxy 2.45 mmol/L 2-CIBEPA phenylanthracene)Solvent ATBC Acetyl tributyl citrate 70 vol % BZB Benzyl benzoate 30 vol% Oxidizing Hydrogen peroxide Hydrogen peroxide 3 wt % liquid, activatorAcid Methanesulfonic acid 1.5 mmol/L Solvent TEC Triethyl citrate 80 vol% ETOH Ethanol 20 vol %5.

Experimental Results

Emission could be confirmed from all surfactants. However, somesurfactants showed weak catalytic effects for emission. However,emission could be confirmed by increasing the concentration to 10000ppm. The results show that the surfactants used in the experiment havecatalytic effects although there are differences in reactivity forluminescence liquids depending on the type of the surfactant.

1 to 6: Anionic surfactants7 to 8: Cationic surfactants9 and 10: Amphoteric surfactants11 to 15: Nonionic surfactantsE=No emission, D=very weak emission, C=weak emission,B=emission, A=intense emission

TABLE 3 Surfactant concentration: 1000 ppm Emission luminance [mcd/m²]Emission observed Test After 1 min After 10 min with naked eye specimensFirst Second Third First Second Third After 1 min After 10 min pH Blank3 2 3 1 1 1 E E 1. Monogen T-423S 2 1 3 4 1 2 E E 7.1 2. Hitenol 330T 2315 22 15 11 13 D D 8.5 3. Neo-Hitenol L-30 111 186 123 20 25 18 C D 5.54. Neocol YSK 316 289 302 267 255 234 B B 7.1 5. Neo-Hitenol ECL-30S27390 23180 24520 7148 6982 8310 A B 6.1 6. Plysurf A208B 10 19 17 383265 118 D B 1.3 7. Catiogen TMP 2 3 3 8746 7986 6548 E B 6.9 8. CatiogenBC-50 14500 130210 14370 8 3 6 A E 8.6 9. Amogen S 1270 1140 1223 523438 521 B B 5.6 10. Amogen AOL 25 18 20 3 2 5 D E 7.8 11. Noigen CL-20010500 10300 14160 4010 3289 4105 A B 8.0 12. Noigen TDS-50 15 18 10 2618 15 D D 6.2 13. Noisgen TDS-200D 14 13 12 5 3 5 D E 6.4 14. Dianol CDE3 1 5 5 1 5 E E 9.8 15. Sorgen TW-80V 10 12 15 3 5 3 D E 9.7

TABLE 4 Surfactant concentration: 5000 ppm Emission luminance [mcd/m²]Emission observed Test After 1 min After 10 min with naked eye specimensFirst Second Third First Second Third After 1 min After 10 min Blank 3 23 1 1 1 E E 1. Monogen T-423S 2 1 3 4 1 2 E E 10. Amogen AOL 14140 1450015000 10 9 13 A D 14. Dianol CDE 3 1 5 5 1 5 E E

TABLE 5 Surfactant concentration: 1000 ppm Emission luminance [mcd/m²]Emission observed Test After 1 min After 10 min with naked eye specimensFirst Second Third First Second Third After 1 min After 10 min Blank 3 23 1 1 1 E E 1. Monogen T-423S 3 3 2 50 55 53 E D 14. Dianol CDE 647 653686 233 254 210 B B

Names in English of the surfactants described above used in INCI are asshown below.

Product name Chemical name Other names or INCI codes 1. Monogen T-423STriethanolamine alkyl sulfate TEA alkyl(C12, 13) sulfate 2. Hitenol 330TSodium polyoxyethylene tridecyl ether Sodium trideceth sulfate sulfate(3E.O.) 3. Neo-Hitenol L-30 Disodium polyoxyethylene lauryl Disodiumlaureth sulfosuccinate sulfosuccinate 4. Neocol YSK Dioctyl sodiumsulfosuccinate Dioctyl sodium sulfosuccinate 5. Neo-Hitenol ECL-30SSodium polyoxyethylene lauryl ether Sodium laureth-4 acetate acetate 6.Plysurf A208B Polyoxyethylene lauryl ether phosphoric Laureth-2phospahate acid 7. Catiogen TMP Cetyltrimethylammonium chlorideCetrimonium chloride 8. Catiogen BC-50 Benzalkonium chloride liquidBenzalkonium chloride 9. Amogen S Betaine lauryldimethylaminoacetateLauryl betaine 10. Amogen AOL Lauryldimethylamine oxide liquid Lauramineoxide 11. Noigen CL-200 Special ether-type nonionic surfactant 12.Noigen TDS-50 Polyoxyethylene tridecyl ether Trideceth-5 13. NoigenTDS-200D Polyoxyethylene tridecyl ether Trideceth-20 14. Dianol CDECoconut oil fatty acid diethanolamide Cocamide DEA, glycerin 15. SorgenTW-80V Polyoxyethylene sorbitane monooleate Polysolvate 80 (20 E.O.)INCI: International Nomenclature of Cosmetic Ingredient Product nameChem/Other name or INCI 1. Monogen T-423S Tri ethanol almine alkyl(C12,13) sulfate, water 2. Hitenol 330T Sodium trideceth sulfate, water 3.Neo-Hitenol L-30 Disodium laureth sulfosuccinate, water 4. Neocol YSKDioctyl sodium sulfosuccinate, water, isopropyl alcohol 5. Neo-HitenolECL-30S Sodium laureth-4 acetate, water 6. Plysurf A208B Laureth-2phospahate 7. Catiogen TMP Cetrimonium chloride, water

A device for detecting residual detergent will now be described.

Into a hollow container 3 (FIG. 1A) having flexibility and a pointedportion shown in FIG. 1 and containing a glass ampule 5, a composition Acontaining an oxalate, a fluorescent substance, and an organic solventis charged. Into the glass ampule, a composition B containing hydrogenperoxide, an organic strong acid, and an organic solvent is charged andsealed. Note that the hollow container 3 is composed of polyethylene andformed by blowing. Subsequently, the neck portion of the hollowcontainer 3 was stretched under heating so as to seal the pointedportion (FIG. 1B). In use, the entire structure is bent to break theglass ampule inside so as to mix the composition A with the compositionB. Then the pointed tip portion was cut to form an opening, and aflexible bulged portion of the hollow container 3 was pressed to dropthe content onto a test subject (FIG. 1C).

FIGS. 3 and 5 show examples in which the composition A and thecomposition B are stored in separate containers. The composition in onecontainer may be transferred to the other container to conduct mixing orthe composition A and the composition B may be transferred to anothercontainer having a cap with a nozzle to conduct mixing, as shown in FIG.4. The method for mixing is not limited to these as long as thecompositions are stored separately.

INDUSTRIAL APPLICABILITY

According to the present invention, emission can be readily recognizedwith naked eye by directly applying or dropping the testing agent onto atest subject, and thus the presence or absence of residual detergent canbe easily and conveniently identified.

1. A method of detecting residual detergent adhering on a surface of atest subject, comprising detecting the residual detergent on the basisof a chemiluminescence phenomenon caused by bringing the test subjectinto contact with a composition containing an oxalate, a fluorescentsubstance, hydrogen peroxide, and a strong acid.
 2. A method ofdetecting residual detergent adhering on a surface of a test subject,comprising detecting the residual detergent on the basis of achemiluminescence phenomenon caused by bringing the test subject intocontact with a composition containing an oxalate, a fluorescentsubstance that emits blue light, hydrogen peroxide, and a strong acid.3. A method of detecting detergent adhering on a test subject,comprising directly applying or dropping a composition containing anoxalate, a fluorescent substance, hydrogen peroxide, and a strong acidonto a test subject so as to detect residual detergent on the basis of achemiluminescence phenomenon that occurs in a surface onto which thecomposition is applied or a portion onto which the composition isdropped.
 4. A method of detecting detergent adhering on a test subject,comprising wiping a test portion of the test subject with a detectingmedium so as to transfer the test portion onto the detecting medium anddetecting residual detergent on the basis of a chemiluminescencephenomenon caused by bringing the detecting medium into contact with acomposition containing an oxalate, a fluorescent substance, hydrogenperoxide, and a strong acid.
 5. A method of detecting detergent adheringon a test subject, comprising wiping a test portion of the test subjectwith a detecting medium so as to transfer the test portion onto thedetecting medium and detecting residual detergent by confirming withnaked eye a chemiluminescence phenomenon caused by bringing thedetecting medium into contact with a composition containing an oxalate,a fluorescent substance, hydrogen peroxide, and a strong acid in a poorlight or a light-shielded container.
 6. A method of detecting detergentadhering on a test subject, comprising impregnating a fibrous member ofa detecting medium with a composition containing an oxalate, afluorescent substance, hydrogen peroxide, and a strong acid, anddetecting residual detergent by confirming, in a poor light or alight-shielded container with naked eye, a chemiluminescence phenomenoncaused by wiping a test portion of a test subject with the detectingmedium and transferring the test portion to the detecting medium. 7-11.(canceled)
 12. A device for detecting residual detergent, comprising aflexible, dropper-type hollow container containing a breakable ampule,wherein one of a composition containing an oxalate, a fluorescentsubstance, and an organic solvent and a composition containing anorganic strong acid and an organic solvent is charged into the hollowcontainer, the other composition is charged and sealed in the breakableampule, and a strong acid is added to one or both of the twocompositions.
 13. A device for detecting residual detergent, wherein afilter that serves as a glass fragment stopper is inserted into thedropper-type hollow container.